A voluntary program established by the EPA in 1992, ENERGY STAR helps businesses and individuals save money and protect the climate by identifying and promoting energy-efficient products and buildings. Products with the ENERGY STAR designation must meet third-party certification based on testing in EPA-recognized labs. Additionally, ENERGY STAR-qualified products are subject to “off-the-shelf” testing at any point throughout the year.
Window and doors protect your home and family from the elements. While some windows are better at keeping you warm, others excel at keeping you cool. ENERGY STAR performance criteria is based on ratings certified by the National Fenestration Rating Council (NFRC), and vary for each of the climate zones shown in the map.